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A rectangular coil of 100 turns has leng...

A rectangular coil of 100 turns has length 5 cm and width 4 cm. it is placed with its plane parallel to a uniform magnetic field and a current of 2 A is sent through the coil. Find the magnitude of the magnetic field B, if the torque acting on the coil is `0.2 Nm^(-1).`

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The correct Answer is:
A, B
`tau=MB`
`0.2=iNL bB rArr B=(0.2)/(100xx2xx5xx4xx10^(-4))=0.5 T`
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RESONANCE-ELECTRODYNAMICS-Exercise-1 PART-1
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